FIELD: information technology.
SUBSTANCE: disclosed are an apparatus and a method for performing procedures (protocols) of a PDCP (packet data convergence protocol) layer and an RLC (radio layer) in an E-UMTS (evolved universal mobile telecommunications system). The PDCP layer performs encoding on data (i.e., PDCP SDU (service data units)) received from an upper layer, generates an indicator discriminating encoded data and non-encoded data (e.g., an ROHC feedback packet directly generated by the PDCP layer), and transmits the same to a lower layer (e.g., MAC (media access control) layer). A PDCP SN (Sequence Number) is defined as an algorithm for encoding the data in the PDCP layer to perform encoding in the PDCP layer.
EFFECT: providing a new protocol layer L2 for a long term evolution system.
16 cl, 6 dwg
